8 in 1 Air Quality Monitor】The 8-in-1 air quality monitor has 5 built-in professional detection sensors, which can accurately detect the current indoor CO2, PM2.5, HCHO, PM1.0, TVOC, PM10, temperature and humidity in the air. 【Three AQI Stages & Sound Alarm】The gas concentration is divided into 3 levels - Green (Safe), Orange (Poor), Red (Unhealthy). When the gas concentration exceeds the set alarm value (alarm value: Orange), it will sound an alarm to remind people. 【Advanced NDIR Sensor】Independent CO2 NDIR sensor has higher precision and stronger anti-interference than semiconductor sensor. Can accurately measure the carbon dioxide concentration in the air. 【Advanced Laser Particle Sensor】The independent PM2.5 particle sensor is more accurate than the infrared sensor. Built-in fan increases gas fluidity and increases detection range and sensitivity. 【Compatible with Tuya Smart/Smart Life APP】You can monitor the gas concentration in your home at any time through the mobile app, turn off the screen in time, and the data can also be transmitted to the app via WiFi. 【NOTE】The air monitor is powered by a supplied Type-C charging cable, it can work for 2 hours after fully charged, so please keep it connecting to the power supply in daily use. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.